Cover Feature: Solid‐State Hydrogen‐Bond Alterations in a [Co2Fe2] Complex with Bifunctional Hydrogen‐Bonding Donors (Chem. Eur. J. 31/2019)

Molecules exhibiting solid-state alterations of pKa by external stimuli are expected to be a useful switching unit in multifunctional molecular solids. It was shown that solid-state alterations of hydrogen-bonding interactions induced by solvent release and thermal intramolecular electron transfers in a hydrogen-bonding donor–acceptor system composed of external stimuli-responsive [Co2Fe2]2+ cations. More information can be found in the Communication by M. Nihei, H. Oshio, et al. on page 7449.